Adware:Adware (or spyware) is a small program that is designed to show advertisements (in various form and degrees of intrusiveness) on your computer. It often reports personal information back to its owners. As a result your sense of privacy can be violated.
Trojan.Backdoor.Agent is a nasty backdoor Trojan for the Windows platform. Once executed, Trojan.Backdoor.Agent will allow a remote attacker to gain an access and control over victim’s computer using a command prompt. This places any personal or financial information stored on your computer in severe jeopardy and represents a serious security risk.
Technical details (How to remove Trojan.Backdoor.Agent(pop up))